# ISO 3201:1975 — Withdrawn and superseded ISO standards

For ISO 3201:1975, item title is Sodium and potassium silicates for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method; status code is 9599; successor is ISO/CD 3201; withdrawn / published date is 1975-03-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3201:1975 _(verified: appears in the quote below)_
- **Item title:** Sodium and potassium silicates for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/CD 3201
- **Withdrawn / published date:** 1975-03-01 _(verified: appears in the quote below)_

## What the source says

> 8399,IS,,ISO 3201:1975,"Sodium and potassium silicates for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method","Silicates de sodium et de potassium à usage industriel — Dosage du fer — Méthode photométrique à la 1,10- phénanthroline",1975-03-01,1,['71.060.50'],ISO/TC 47,9599,,[8400],"['en','fr']",2,

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).